1958 Cave 10 inch f-7 Telescope - Al-Paslow
Aother closeup of the Cotton within the cupport. Another thing to notice, that CAVE like Ken NOVAK, both use similuar spider designs. (Although I don not believe NOVAK used cotton as a mirror support!) 

The cylinder has a beveled edge that the diagonal mirror fits into from inside; hence it supports the optic by the mirrors face to an extent.  Actually this rim or bevel runs the entire circumference of the ellipse, and adds a tiny amount of obstruction to the entire system.

Aother closeup of the Cotton within the cupport. Another thing to notice, that CAVE like Ken NOVAK, both use similuar spider designs. (Although I don not believe NOVAK used cotton as a mirror support!)

The cylinder has a beveled edge that the diagonal mirror fits into from inside; hence it supports the optic by the mirrors face to an extent. Actually this rim or bevel runs the entire circumference of the ellipse, and adds a tiny amount of obstruction to the entire system.

cavemirrors017